Daniel Defense

Daniel Defense M4A1 Upper Receiver 5.56mm 14.5"/16" Overall Barrel

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5.00 LBS


Daniel Defense’s M4A1 AR15 Style Upper Receiver Group was inspiered by the USSOCOM SOPMOD Block II, and comes packed with Daniel Defense exclusive features. The upper receiver is MIL-SPEC with indexing marks and M4 feed ramps, and is constructed from CNC Machined 7075-T6 aluminum. The Barrel is cold hammer forged is chrome lined, and is topped with Daniel Defense’s Extended Flash Suppressor, while the Gas System is carbine length and is direct impingement. Other features include a Bolt Carrier Group with chrome lining and an M16 profile, and a Daniel Defense M4A1 FSP Rail Interface handguard with four picatinny rails in the 12 o’clock, 3 o’clock, 6 o’clock, and 9 o’clock positions.

Features of the Daniel Defense M4A1 FSP Upper Receiver Group:

  • Quad-rail handguard
  • Daniel Defense Extended Flash Suppressor
  • Daniel Defense M4A1 Rail Interface handguard
  • Grip-N-Rip charging handle


  • Caliber:5.56 NATO
  • Weight:4.56 lbs
  • Rifle Barrel Length:14.5 inches
  • Rifle Barrel Twist:1:7"
  • Iron Sights No
  • Caliber or Gauge:5.56 x 45mm NATO
  • Item ConditionNew
  • Product TypeReceiver
  • UPC815604016612
  • MPN23-004-13150

WARNING This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to You must be 18+ years old to shop and or purchase on our website and 21+ to purchase Ammunition/Firearms. Check local laws before ordering as you certify you are of legal age and satisfy all federal, state, and local legal/regulatory requirements. There are NO returns or exchanges on armor, firearms, ammunition, PPE equipment. Ammo ships UPS ground to the lower 48 states.
We reserve the right to fix any critical errors.

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Additional Information

Complete Upper Receiver
14.5"/16" Overall
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